Here are 9 facts about Venice you probably didn’t know. - Venice is known for its bridges. There are 417 bridges in Venice. - Houses in Venice are numbered according to districts, not streets. - There are about 350 gondolas and 400 gondolieri in Venice. On average, gondolas are 11 meters long. - In 1608, the Council of Ten approved wearing masks only during the carnival. - There are 177 canals in Venice. The S-shaped Grand Canal is the biggest. - The San Marco bell tower, or campanile, was built in the 12th century and collapsed in 1902. - The population of Venice has decreased from 120,000 to 60,000 in the last 50 years. - The first woman in the world that graduated was born in Venice in 1646. - The first public casino in the world was opened in Venice in 1638.